Toyota Tacoma 2015-2018 Service Manual: Diagnosis System

(a) The diagnosis function turns off the cruise control indicator, illuminates
the master warning light and displays a warning message when a malfunction is detected.
When a malfunction is detected in the dynamic radar cruise control system, DTCs
are stored in the ECM or millimeter wave radar sensor assembly.

*1

Cruise Control Indicator

(Constant Speed Control Mode)

*2

Cruise Control Indicator

(Vehicle-to-vehicle Distance Control Mode)

*3

Master Warning Light

NOTICE:

If DTCs related to the communication system are stored, "Cruise Control
Malfunction Visit Your Dealer", which is displayed in the combination meter
assembly, disappears when the system returns to normal.

If DTCs not related to the communication system are stored, "Cruise
Control Malfunction Visit Your Dealer", which is displayed in the combination
meter assembly, disappears when the ignition switch off then back ON after
the system returns to normal.

DESCRIPTION

(a) The ECM and millimeter wave radar sensor assembly control the dynamic radar
cruise control system of the vehicle. The data and DTCs relating to the dynamic
radar cruise control system can be read from the DLC3 of the vehicle. Use the Techstream
to check and solve the problem.

CHECK DLC3

(a) Check the DLC3.

Click here

CHECK INDICATOR

(a) Turn the ignition switch to ON.

(b) Check that the cruise control indicator illuminates when the dynamic radar
cruise control system is turned on using the cruise control main switch (ON-OFF
button), and that the indicator turns off when the dynamic radar cruise control
system is turned off using the cruise control main switch (ON-OFF button).